Brian Tracy & Christina Tracy Stein. (2012). Kiss That Frog: 12 Great Ways to Turn Negatives into Positives in Your Life and Work. Collins Business.
Chicago Stili AlıntıBrian Tracy ve Christina Tracy Stein. Kiss That Frog: 12 Great Ways to Turn Negatives into Positives in Your Life and Work. Noida, Uttar Pradesh: Collins Business, 2012.
MLA AlıntıBrian Tracy ve Christina Tracy Stein. Kiss That Frog: 12 Great Ways to Turn Negatives into Positives in Your Life and Work. Collins Business, 2012.
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